Compositions and methods for treating hair

ABSTRACT

Disclosed are hair styling compositions comprising at least two latex acrylate polymers, wherein at least one latex acrylate polymer is a film-forming polymer. Methods of styling the hair are also disclosed.

TECHNICAL FIELD

The disclosure relates to hair styling compositions comprising at least two latex polymers, wherein at least one latex polymer is a film-forming polymer. The at least two latex polymers are chosen from acrylate polymers. In various embodiments of the disclosure, the at least two latex polymers are chosen to have certain properties. Compositions comprising the at least two latex polymers may, according to certain embodiments, form films that have surprising properties. Methods of styling the hair with such compositions are also disclosed.

BACKGROUND

Compositions for styling the hair are known, such as, for example, hair spray compositions, hair gels and mousses, hair volumizing compositions, hair smoothing creams, lotions, serums, oils, clays, etc. The goals of many hair styling compositions include to hold or fix the hair in a particular shape, to impart or increase volume of the hair, and/or to smooth the hair, e.g. to decrease or eliminate the appearance of frizz.

Drawbacks associated with current products for styling the hair include that the product is often sticky or tacky and/or often produces a film that imparts a sticky or tacky feel, and styled hair that is stiff and/or “crunchy” (i.e. the film is hard and brittle resulting in a crunching feel or sound when the hair is touched), which is undesirable for most consumers.

Current products for styling the hair typically include water soluble film-forming polymers. Depending on the chemical make-up of these polymers, they may be either soluble in water, or they may be water insoluble polymers which are made water soluble via various chemical modifications, such as neutralization. Solutions comprising these polymers tend to be viscous, i.e. as the concentration of the polymer increases, its viscosity builds up rapidly. Translated to styling applications, as the solvent evaporates, the polymer solution becomes thicker on the hair surface, resulting in a sticky or tacky film. These products also tend to exhibit problems with product spreadability, hair manageability, and low degree of humidity resistance which is particularly a problem in hot and humid countries.

The use of latex polymers is also known, for example, to provide extended-wear properties to a cosmetic product (e.g. mascara, eyeliner, nail polish) into which they are formulated.

Some known compositions include one latex polymer. For example, U.S. Pat. No. 6,126,929 describes a composition comprising a dispersion of a latex film former, optionally with a plasticizer, and a non film-forming particle not capable of being film-formed. U.S. Pat. No. 4,710,374 describes a composition comprising cationic polymers, a surfactant, and an anionic latex. U.S. Pat. No. 7,740,832 describes a composition comprising at least one non-latex polymer and an anionic, cationic or amphoteric fixing polymer. U.S. Pat. No. 4,798,721 describes a composition comprising a latex particle. U.S. Patent Application No. 2005/0089490 A1 describes a composition comprising a water-dispersible styling polymer and a gel-forming polymer.

Other known cosmetic compositions include various components to provide improved properties such as adhesion, flexibility, and compatibility of other components. For example, U.S. Patent Application No. 2007/0224140 A1 describes a composition comprising a cosmetically acceptable medium, a non film-forming microsphere to provide adhesion, and a film-forming component comprising two water-borne emulsion polymers. French Patent Application No. FR 2 968 978A describes an eyeliner composition comprising at least two film-forming latexes and a plasticizer to increase the flexibility of the film. French Patent Application No. FR 2 898 050A describes a composition comprising a fatty acid ester, and a copolymer of a (meth)acrylate polymer and a hydroxyester (meth)acrylate. U.S. Patent Application No. 2009/0297467A describes a composition comprising at least one neutralized sulfonated polymer and mixtures of acrylates and hydroxyester acrylates. U.S. Patent Application No. 2009/035335 A1 describes a mascara composition comprising two water-dispersible acrylate polymers, and a cross-linked polymeric film-former to enhance the compatibility and bind the two water-dispersible acrylate polymers. International Patent Application No. WO 2011/137338 A2 describes a composition comprising a acrylate dispersion and an acrylic film-forming dispersion. U.S. Patent Application No. 2004/0071646A describes an aerosol device containing a composition comprising a polyurethane dispersion having a particle size of from 0.1-1 μm, and at least one non-latex fixing polymer.

Additionally, some cosmetic compositions incorporate polymers having a core-shell structure. For example, U.S. Patent Application No. 2003/0064045 Al describes a mascara composition comprising a dispersion of particles having a core-shell structure. U.S. Patent Application No. 2007/0286833 A1 describes a multistage polymer comprising a latex core-shell particle comprising a soft polymer and a hard polymer. In addition, U.S. Patent Application No. 2009/0317432A describes an applicator for makeup containing a composition comprising a colorant and at least one latex or core-shell latex particle.

Cosmetic compositions in a non-aqueous medium are known. For example, European Patent Application No. EP 1 082 953A describes a dispersion comprising two film formers in isododecane. International Patent Application No. WO11056332A describes a composition comprising three volatile solvents, and at least one film former, for example silicon acrylate or acrylate, soluble or dispersible in at least one of the three solvents.

Compositions for use in mascaras may have low glass transition temperatures (“Tg”) to obtain a soft film. For example, U.S. Patent Application No. 2010/0028284 A1 describes a mascara composition comprising at least two acrylate film formers, where the glass transition temperature (“Tg”) of the mascara composition is ≤20° C. U.S. Patent Application No. 2006/134043A describes a mascara composition comprising a fatty acid and at least one acrylate resin emulsion.

Some known compositions use solubilized polymers rather than polymer particles. For example, U.S. Pat. No. 7,651,693 describes a composition comprising a solubilized blend of two polymers. U.S. Pat. No. 6,214,328 describes a composition comprising at least one acrylate latex that is soluble in solutions containing low volatile organic compounds or in water upon neutralization.

U.S. Pat. No. 5,441,728 describes a composition comprising a water-soluble fixative polymer and a latex particle. Water-soluble polymers tend to be sticky, and may not be suitable for applications requiring a clean touch.

French Patent Application No. FR 2 834 458A describes a nail polish composition comprising two film formers in an aqueous medium in a specific ratio.

However, it has now been discovered that by providing a composition comprising at least two latex polymers chosen from acrylate polymers, wherein at least one of said latex polymers is a film-forming polymer, it is possible to form a film on a substrate that has certain desirable properties, such as a clean, natural, and/or “invisible” feel, and a lack of stickiness. Such compositions may be useful in hair-styling applications wherein styling benefits such as natural look, curling or straightening, and styling hold are imparted to hair.

Moreover, compositions according to embodiments of the disclosure may be prepared that deliver a surprisingly broad range of hair styling benefits, such as, for example, from low to high style-hold and curl-retention properties, for example by varying the weight ratio between both latex acrylate polymers, with or without additives.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

The disclosure relates, in various embodiments, to compositions comprising at least two latex acrylate polymers, wherein at least one latex acrylate polymer is a film-forming polymer. In various embodiments, the at least two latex acrylate polymers may be chosen to have certain properties. In at least certain embodiments, the at least two latex acrylate polymers are present in a combined amount ranging from about 0.1% to about 30% by weight, relative to the weight of the composition. In further embodiments, the at least two latex acrylate polymers are present in the composition in a weight ratio of about 10:1 to about 1:10.

The composition comprising the at least two latex acrylate polymers forms a film when applied to a substrate. The film may, according to at least certain embodiments of the disclosure, have a Young's modulus ranging from about 0.05 MPa to about 5 GPa, and/or a strain under stress at 0.5 MPa that ranges up to about 300%. By way of example only, the film may have a Young's modulus ranging from about 80 MPa to about 5 GPa and a strain, under stress at 0.5 MPa, ranging from about 0.01% to less than about 1%. By way of further example, the film may have a Young's modulus ranging from about 5 MPa to about 100 MPa and a strain, under stress at 0.5 MPa, ranging from about 0.5% to less than about 20%. By way of yet further example, the film may have a Young's modulus ranging from about 0.05 MPa to about 5 MPa and a strain, under stress at 0.5 MPa, ranging from about 10% to about 300%.

In at least certain exemplary embodiments according to the disclosure, the resulting film formed by the composition comprising at least two latex acrylate polymers, wherein at least one latex polymer is a film-forming polymer, is clear and/or transparent.

In further embodiments, methods of styling the hair are disclosed, said methods comprising applying compositions according to the disclosure to the hair. Such styling methods may comprise shaping, reshaping, positioning, repositioning, adding volume to, curling, or straightening the hair, in order to achieve a certain hair style or appearance.

Latex Polymers

According to various exemplary embodiments of the disclosure, the at least two latex polymers, at least one of which is a film-forming polymer, are chosen from acrylate polymers. The at least two latex acrylate polymers may be present in a combined amount ranging from about 0.1% to about 30% by weight, relative to the weight of the composition. In other embodiments, the at least two latex acrylate polymers may be present in the composition in a weight ratio of about 10:1 to about 1:10.

In various embodiments, the at least two latex acrylate polymers, at least one of which is a film-forming polymer, may be identified as polymer A and polymer B. Compositions according to certain embodiments may comprise at least one polymer A and at least one polymer B, wherein at least one of polymer A and polymer B is a film-forming polymer.

In various embodiments, polymer A may be chosen from latex acrylate polymers having a Young's modulus ranging from about 0.1 MPa to about 10 MPa, and a strain, under stress at 0.5 MPa, of at least about 1%; and polymer B may be chosen from latex acrylate polymers having a Young's modulus ranging from about 10 MPa to about 6 GPa, and a strain, under stress at 0.5 MPa, of less than about 5%. In at least certain embodiments, polymer A may have a glass transition temperature (Tg) ranging from about −90° C. to about 40° C., and polymer B may have a glass transition temperature (Tg) ranging from about 40° C. to about 200° C. In at least certain other embodiments, the weight ratio of polymer A to polymer B in the compositions of the disclosure is from about 1:10 to about 1:1, from about 3:1 to about 10:1, or from about 5:1 to about 10:1.

In at least certain exemplary and non-limiting embodiments, latex acrylate polymers A and B may be chosen such that polymer A comprises at least one latex acrylate polymer which is optionally a film-forming polymer that is a relatively soft, flexible latex polymer, and polymer B comprises at least one latex acrylate polymer which is optionally a film-forming polymer that is a relatively hard, brittle polymer, although such characteristics are not required.

At least one of polymer A and polymer B is a film-forming polymer. In various exemplary embodiments, latex polymer A is a film-forming polymer and latex polymer B is a non-film-forming polymer. In further exemplary embodiments, latex polymer A is a non-film-forming polymer and latex polymer B is a film-forming polymer. In yet further exemplary embodiments, latex polymer A is a film-forming polymer and latex polymer B is a film-forming polymer.

As used herein, a film-forming polymer is meant to include a polymer that is capable, by itself or in the presence of an auxiliary film-forming agent, of forming a macroscopically continuous film that adheres to keratin materials, and preferably a cohesive film, better still, a film whose cohesion and mechanical properties are such that said film can be isolated and manipulated individually, for example, when said film is prepared by pouring onto a non-stick surface such as Teflon-coated or silicone-coated surface. In addition, as used herein, a non-film-forming polymer is meant to include a polymer which will not form a film at ambient temperature or below, or in other words, will only form a film at temperatures above ambient. For purposes of this disclosure, ambient temperature is taken as being below 40° C. such as in the range of 15° C. to 30° C.

By “at least two latex acrylate polymers,” it is contemplated that more than two latex acrylate polymers may be chosen. Thus, for example, in various embodiments, both polymers A and B in the compositions of the disclosure may be latex film-forming acrylate polymers, and the composition may also comprise at least one latex polymer that is a non-film-forming acrylate polymer; or one of polymer A and B may be a film-forming acrylate polymer while the other is a non-film-forming acrylate polymer, but at least one additional film-forming (latex or non-latex) polymer may also be added; and so on.

In further embodiments, the composition comprises exactly two latex acrylate polymers, at least one of which is a film-forming polymer. In yet further embodiments, the composition comprises at least two latex acrylate polymers, one or both of which are film-forming polymers, but does not comprise any additional film-forming polymers.

In at least certain embodiments of the disclosure, the at least two latex polymers are provided in the form of aqueous dispersions prior to formulating the compositions of the disclosure. In various embodiments, the aqueous dispersions may be obtained through an emulsion polymerization of monomers wherein the resulting latex polymers have a particle size lower than about 1 μm. In at least one exemplary embodiment, a dispersion prepared by the polymerization in water of one or more monomers having a polymerizable double bond may be chosen. In another exemplary embodiment, the aqueous dispersions obtained through an emulsion polymerization may be spray-dried.

In other embodiments, the latex polymers are produced from condensation reactions between monomers and subsequently dispersed in an aqueous medium.

Thus, the latex acrylate polymers may, in various exemplary embodiments, exist as dispersed polymer particles in a dispersion medium, such as an aqueous dispersion medium. The latex acrylate polymers may, in certain embodiments, each be dispersed in independent dispersion media. In yet further embodiments, the latex acrylate polymers may be dispersed together in the same dispersion medium.

The dispersion medium comprises at least one solvent chosen from water. The dispersion medium may further comprise at least one solvent chosen from cosmetically acceptable organic solvents. Cosmetically acceptable organic solvents may, in various embodiments, be water-miscible, e.g. capable of forming at 25° C. a homogeneous mixture that is transparent, or substantially transparent, to the eye. For instance, cosmetically acceptable organic solvents may be chosen from lower monoalcohols, such as those containing from about 1 to 5 carbon atoms, for example ethanol and isopropanol; polyols, including glycols, such as those containing from about 2 to 8 carbon atoms, for example propylene glycol, ethylene glycol, 1,3-butylene glycol, dipropylene glycol, hexylene glycol, and glycerin; hydrocarbons, such as, for example, isododecane and mineral oil; and silicones, such as dimethicones, cyclomethicones, and cyclopentasiloxane; as well as mixtures thereof.

In at least one embodiment, the solvent of the dispersion medium consists of water. In other embodiments, the solvent of the dispersion medium consists of water and at least one cosmetically acceptable organic solvent. In further embodiments, the solvent comprises water. In yet further embodiments, the solvent of the dispersion medium primarily comprises water. For example, the solvent of the dispersion medium may, in at least certain exemplary embodiments, comprise greater than 50% water, such as greater than 55% water, greater than 60% water, greater than 65% water, greater than 70% water, greater than 75% water, greater than 80% water, greater than 85% water, greater than 90% water, greater than 95% water, greater than 96% water, greater than 97% water, greater than 98% water, or greater than 99% water.

In embodiments according to the disclosure, the latex polymer particles are not soluble in the solvent of the dispersion medium, i.e. are not water soluble and/or are not soluble in the at least one cosmetically acceptable organic solvent. Accordingly, the latex polymers retain their particulate form in the solvent or solvents chosen.

In at least certain exemplary embodiments, latex particles according to the disclosure may have an average diameter ranging up to about 1000 nm, such as from about 50 nm to about 800 nm, or from about 100 nm to about 500 nm. Such particle sizes may be measured with a laser granulometer (e.g. Brookhaven BI90).

In various embodiments, the latex acrylate polymers may, independently, be neutralized, partially neutralized, or unneutralized. In exemplary embodiments where the latex polymers are neutralized or partially neutralized, the particle size may be, for example, greater than about 800 nm. In at least certain embodiments, the particulate form of the latex acrylate polymers is retained in the dispersion medium.

In further embodiments, the latex acrylate polymers may be chosen from uncharged and charged latex polymers. Thus, the latex acrylate polymers may, according to various exemplary embodiments, be chosen from nonionic latex acrylate polymers, cationic latex acrylate polymers, and anionic latex acrylate polymers.

As non-limiting examples of latex acrylate polymers that may be used, mention may be made, independently, of acrylate latex polymers such as those resulting from the homopolymerization or copolymerization of monomers chosen from (meth)acrylics, (meth)acrylates, (meth)acrylamides and/or vinyl homopolymers or copolymers. The term “(meth)acryl” and variations thereof, as used herein, means acryl or methacryl.

The (meth)acrylic monomers may be chosen from, for example, acrylic acid, methacrylic acid, citraconic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, and maleic anhydride. Additional non-limiting examples of (meth)acrylic monomers include C1-C8 alkyl (meth)acrylic, such as, for example, methyl (meth)acrylic, ethyl (meth)acrylic, propyl (meth)acrylic, isopropyl (meth)acrylic, butyl (meth)acrylic, tert-butyl (meth)acrylic, pentyl(meth) acrylic, isopentyl (meth)acrylic, neopentyl (meth)acrylic, hexyl (meth)acrylic, isohexyl (meth)acrylic, 2-ethylhexyl (meth)acrylic, cyclohexyl (meth)acrylic, isohexyl (meth)acrylic, heptyl (meth)acrylic, isoheptyl (meth)acrylic, octyl (meth)acrylic, isooctyl (meth)acrylic, as well as combinations of any of the above.

The esters of (meth)acrylic monomers may be, by way of non-limiting example, C1-C8 alkyl (meth)acrylates such as methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, isopropyl (meth)acrylate, butyl (meth)acrylate, tert-butyl (meth)acrylate, pentyl(meth) acrylate, isopentyl (meth)acrylate, neopentyl (meth)acrylate, hexyl (meth)acrylate, isohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, cyclohexyl (meth)acrylate, isohexyl (meth)acrylate, heptyl (meth)acrylate, isoheptyl (meth)acrylate, octyl (meth)acrylate, isooctyl (meth)acrylate, allyl (meth)acrylate, and combinations thereof. Additional and non-limiting examples include C1-C8 alkoxy (meth)acrylates, such as methoxy (meth)acrylate, ethoxy (meth)acrylate, propyl oxide (meth)acrylate, isopropyl oxide (meth)acrylate, butyl oxide (meth)acrylate, tert-butyl oxide (meth)acrylate, pentyl oxide (meth) acrylate, isopentyl oxide (meth)acrylate, neopentyl oxide (meth)acrylate. The esters may be, by way of non-limiting example, C2-C6 hydroxy alkyl (meth)acrylates, such as hydroxy ethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, glycidyl (meth)acrylate, ethylene glycol di(meth)acrylate, polyethylene glycol mono(meth)acrylate, 1,4-butane diol di(meth)acrylate, 1,6,hexane diol di(meth)acrylate, and any combination thereof. The esters may be, by way of non-limiting example, aryl (meth)acrylates such as benzyl (meth)acrylate, phenyl (meth)acrylate, and any combination thereof. The esters can further contain amino groups such as aminoethyl (meth)acrylate, N,N-dimethylaminoethyl (meth)acrylate, N,N-dimethylaminopropyl (meth)acrylate, N,N-dimethylaminodimethylpropyl (meth)acrylate, N,N-diethyleaminoethyl (meth)acrylate, and N,N,N-trimethylaminoethyl (meth)acrylate; and salts of the ethylenic amines.

According to at least certain exemplary embodiments, the alkyl group of the esters may be either fluorinated or perfluorinated, e.g. some or all of the hydrogen atoms of the alkyl group are substituted with fluorine atoms. The monomers can also be fluorine-containing monomers, such as, by way of non-limiting example, trifluoroethyl methacrylate, 2,2,3,3-tetrafluoropropyl methacrylate, 2,2,3,3,4,4-hexafluorobutyl methacrylate, perfluorooctyl methacrylate and perfluorooctyl acrylate; and silicone macromonomers.

The amides of (meth)acrylic monomers can, for example, be made of (meth)acrylamides, and especially N-alkyl (meth)acrylamides, in particular N-(C1-C12) alkyl (meth)acrylates such as N-ethyl (meth)acrylamide, N-t-butyl (meth)acrylamide, N-t-octyl (meth)acrylamide, N-methylol (meth)acrylamide and N-diacetone (meth)acrylamide, and any combination thereof.

The vinyl monomers can include, but are not limited to, vinyl cyanide compounds such as acrylonitrile and methacrylonitrile; vinyl esters such as vinyl formate, vinyl acetate, vinyl propionate, vinyl neodecanoate, vinyl pivalate, vinyl benzoate and vinyl t-butyl benzoate, triallyl cyanurate; vinyl halides such as vinyl chloride and vinylidene chloride; aromatic mono- or divinyl compounds such as styrene, α-methylstyrene, chlorostyrene, alkylstyrene, divinylbenzene and diallyl phthalate, and combination thereof. Other non-limiting ionic monomers can include para-styrensulfonic, vinylsulfonic, 2-(meth)acryloyloxyethylsulfonic, 2-(meth)acrylamido-2-methylpropylsulfonic acids.

The list of monomers given is not limiting, and it should be understood that it is possible to use any monomer known to those skilled in the art which includes acrylic and/or vinyl monomers (including monomers modified with a silicone chain).

Silicone acrylic polymers may also optionally be used as vinyl polymer in at least one exemplary and non-limiting embodiment.

In at least certain, non-limiting exemplary embodiments, acrylic latex polymers may be chosen from aqueous dispersions of Methacrylic Acid/Ethyl Acrylate copolymer (INCI: Acrylates Copolymer, such as Luviflex® Soft by BASF), PEG/PPG-23/6 Dimethicone Citraconate/C10-30 Alkyl PEG-25 Methacrylate/Acrylic Acid/Methacrylic Acid/Ethyl Acrylate/Trimethylolpropane PEG-15 Triacrylate copolymer (INCI: Polyacrylate-2 Crosspolymer, such as Fixate Superhold™ by Lubrizol), Styrene/Acrylic copolymer (such as Neocryl® A-1120, DSM), Ethylhexyl Acrylate/Methyl Methacrylate/Butyl Acrylate/Acrylic Acid/Methacrylic Acid copolymer (INCI: Acrylates/Ethylhexyl Acrylate Copolymer, such as Daitosol 5000SJ, Daito Kasei Kogyo), Acrylic/Acrylates Copolymer (INCI name: Acrylates Copolymer, such as Daitosol 5000AD, Daito Kasei Kogyo), and Acrylic copolymers and Acrylates Copolymers, such as those known under the tradenames VINYSOL 2140 (Daido Chemical), ACULYN™ 33 (Dow Chemical), LUVIMER® MAE (BASF), or BALANCE CR (AKZO NOBEL).

In various embodiments according to the disclosure, it may be possible to choose a polymer that comprises both acrylate and polyurethane parts at the molecular level.

Compositions

As described herein, exemplary compositions according to the disclosure may comprise at least two latex polymers chosen from acrylate polymers, wherein at least one of the latex acrylate polymers is a film-forming polymer. In certain embodiments, each of the latex acrylate polymers is present in an amount ranging from about 0.05% to about 10% by weight, such as about 0.1% to about 7.5% by weight, such as about 0.25% to about 5% by weight, such as about 0.5% to about 2.5% by weight, or about 0.5% to about 1.5% by weight, relative to the weight of the composition, including all ranges and subranges there between. In other embodiments, each of the latex acrylate polymers is present in an amount ranging from about 1% to about 15% by weight, such as about 1% to about 12% by weight, such as about 1.2% to about 12% by weight, such as about 1.5% to about 10% by weight, or such as less than about 10% by weight, relative to the weight of the composition, including all ranges and subranges there between. In yet other embodiments, each of the latex acrylate polymers is present in an amount ranging from about 0.1% to about 2% by weight, such as about 0.15% to about 1.9% by weight, or such as about 0.18% to about 1.8% by weight, relative to the weight of the composition, including all ranges and subranges there between.

In certain embodiments, the latex acrylate polymers are present in a combined amount ranging from about 0.1% to about 30% by weight, such as about 0.1% to about 25% by weight, such as about 0.2% to about 20% by weight, such as about 0.2% to about 15% by weight, such as about 0.5% to about 10% by weight, such as about 1% to about 8% by weight, such as about 1% to about 5% by weight, such as about 1% to about 3% by weight, or such as below about 30% by weight, or such as about 25% by weight, or such as about 20% by weight, relative to the weight of the composition, including all ranges and subranges there between. By way of non-limiting example, the combined amount of latex acrylate polymers may be about 0.1%, about 0.5%, about 1%, about 2%, about 3%, about 4%, about 5%, about 6%, about 7%, about 8%, about 9%, about 10%, about 11%, about 12%, about 13%, about 14%, about 15%, about 16%, about 17%, about 18%, about 19%, about 20%, about 21%, about 22%, about 23%, about 24%, about 25%, about 26%, about 27%, about 28%, about 29%, or about 30%, by weight, relative to the weight of the composition.

In yet further embodiments, the combined amount of latex acrylate polymers ranges up to about 30%, such as up to about 29%, such as up to about 28%, such as up to about 27%, such as up to about 26%, such as up to about 25%, such as up to about 24%, such as up to about 23%, such as up to about 22%, such as up to about 21%, such as up to about 20%, such as up to about 19%, up to about 18%, up to about 17%, up to about 16%, up to about 15%, up to about 14%, up to about 13%, up to about 12%, up to about 11%, up to about 10%, up to about 10%, up to about 9%, up to about 8%, up to about 7%, up to about 6%, up to about 5%, up to about 4%, up to about 3%, up to about 2%, or up to about 1%, each by weight, relative to the weight of the composition. In at least one exemplary embodiment, the combined amount of latex acrylate polymers is less than about 10% by weight, such as less than about 5% by weight, relative to the weight of the composition.

According to various embodiments of the disclosure, the weight ratio of the at least two latex acrylate polymers, e.g. polymer A to polymer B, may range from about 10:1 to about 1:10, such as about 9:1 to about 1:9, about 8:1 to about 1:8, about 7:1 to about 1:7, about 6:1 to about 1:6, about 5:1 to about 1:5, about 4:1 to about 1:4, about 3:1 to about 1:3, or about 2:1 to about 1:2, including all ranges and subranges there between. It should be understood that when polymer A and/or polymer B comprise at least one latex film-forming polymer, the weight ratio includes the total amount of polymer A and/or polymer B.

According to various embodiments of the disclosure, the weight ratio of polymer A to polymer B is about 10:1, about 9:1, about 8:1, about 7:1, about 6:1, about 5:1, 4:1, about 3:1, about 2:1, about 1:1, about 1:2, about 1:3, about 1:4, about 1:5, about 1:6, about 1:7, about 1:8, about 1:9, or about 1:10.

In at least certain exemplary and non-limiting embodiments, when polymer A is chosen from latex acrylate polymers having a Young's modulus ranging from about 0.1 MPa to about 10 MPa, and a strain, under stress at 0.5 MPa, of at least about 1%; and polymer B is chosen from latex acrylate polymers having a Young's modulus ranging from about 10 MPa to about 6 GPa, and a strain, under stress at 0.5 MPa, of less than about 5%, different weight ratios of polymer A to polymer B may be chosen to correspond to different hair styling applications. By way of example only, a weight ratio of polymer A to polymer B ranging from about 1:10 to about 1:1 may, in some embodiments, provide a high level of style hold; a weight ratio of polymer A to polymer B ranging from about 5:1 to about 10:1 may, in some embodiments, provide a medium to high level of style hold; and a weight ratio of polymer A to polymer B ranging from about 3:1 to about 10:1 may, in some embodiments, provide a light to medium level of style hold.

In addition to the at least two latex acrylate polymers, wherein at least one is a film-forming polymer, the compositions may further comprise at least one solvent. The at least one solvent may be chosen from water, at least one cosmetically acceptable organic solvent, or a mixture of water and at least one cosmetically acceptable organic solvent. Cosmetically acceptable organic solvents may, in various embodiments, be water-miscible, e.g. a mixture capable of forming at 25° C. a homogeneous mixture that is transparent, or substantially transparent, to the eye. For instance, cosmetically acceptable organic solvents may be chosen from lower monoalcohols, such as those containing from about 1 to 5 carbon atoms, for example ethanol and isopropanol; polyols, including glycols, such as those containing from about 2 to 8 carbon atoms, for example propylene glycol, ethylene glycol, 1,3-butylene glycol, dipropylene glycol, hexylene glycol, and glycerin; hydrocarbons, such as, for example, isododecane and mineral oil; and silicones, such as dimethicones, cyclomethicones, and cyclopentasiloxane; as well as mixtures thereof.

The at least one solvent may be present in an amount ranging up to about 95%, such as from about 1% to about 90%, from about 5% to about 80%, or from about 10% to about 60% by weight, relative to the total weight of the composition.

In at least certain exemplary embodiments, the latex polymer particles are not soluble in the solvent of the composition, and thus remain in particulate form even after evaporation of the solvent. For example, in embodiments where the composition comprises alcohol as a cosmetically acceptable organic solvent, the latex particles may remain in particulate form upon evaporation of the alcohol, such as once the composition is applied to a substrate.

Compositions according to various embodiments of the disclosure may further comprise additional components that are typically used in hair styling compositions. Such components are known to those of skill in the art, or are within the ability of those of skill in the art to determine depending on the particular application, such as, for example, the particular component and/or amount thereof. Such components include, but are not limited to, coalescents, plasticizers, and thickening agents.

In various embodiments, the composition described herein may have a pH ranging from about 2 to about 9, such as about 3 to about 8, or about 4 to about 7.

In at least certain exemplary embodiments, the compositions are in the form of hair styling compositions, in any form, such as, for example, a gel, a cream, a foam, a lotion, an emulsion, or a liquid that may be sprayed onto or otherwise applied to the hair. In various embodiments, the composition may be provided in the form of a gel, a mousse, or a spray. In at least certain embodiments, the composition may be applied to the hair by first applying to the hands, and then contacting the hair with the hands; in other embodiments, the composition may be applied directly onto the hair, such as by spraying. The compositions may, in various embodiments, be applied to the hair as a leave-on treatment.

In various embodiments, the application of an external stimuli, such as heat, may be desirable as part of the hair styling process. By way of example only, before, during, or after the composition is applied to wet or dry hair, the hair may optionally be further treated with an external stimuli, for example with heat ranging from about 25° C. to about 250° C. In at least certain embodiments, the hair may also be shaped or positioned as desired while exposed to external stimuli, such as while heated or exposed to heat.

Professional and consumer heating tools can be used as a means to deliver heat or an elevated temperature to the hair. The heating tools can generate heat through electrical current or heating lamps. Depending upon the desired style, these tools include, but are not limited to, heaters, blow dryers, flat irons, hot combs, hot curler sets, steam pods, heated crimpers, heated lash curlers, heated wands/brushes, and hood driers or their combinations thereof.

As described, compositions according to the disclosure may impart a film on a substrate, such as on the hair or on the hand during or after application to the hair. A film formed by the composition may, surprisingly, be clean-feeling and not sticky, as with traditional hair styling compositions. Also surprisingly, the composition may impart a film on the hair that leaves the hair relatively natural and clean-feeling, yet has a flexible coating, leaving little to no residue, allows the hair to be bouncy and springy with little to no frizz or flaking, may impart relatively high definition with individualized curls, style control, volume, and shine, and/or may allow for relatively long-lasting hold and style memory. Furthermore, in at least certain embodiments according to the disclosure, the compositions are not sticky or tacky. A user of hair compositions according to various embodiments described herein may thus feel that the composition is not perceptible or is “invisible,” yet still effectively style and/or hold the hair. Additionally, the compositions may have effective hair styling and/or hold properties, even in conditions of high, or relatively high, humidity. In at least certain embodiments according to the disclosure, the compositions may be quick-drying, which may allow drying and/or styling time to be reduced, as well as further improve ease of styling and curl retention.

Furthermore, as described, compositions prepared according to various embodiments may provide for varying degrees of hold to be imparted to a hair style. By way of non-limiting example only, in order to obtain a spiky look to hair of a very short length, a high level of styling hold may be desirable. Or, as a further non-limiting example, in order to obtain a flowing look or to maintain hair curls for hair of medium length or longer length, a light to medium level of style hold may be desirable. By altering the weight ratio of the first and second polymers, it is possible to formulate compositions having high levels of style hold, medium to high levels of style hold, medium levels of style hold, or light to medium levels of style hold.

In at least certain embodiments, a film formed by the compositions described herein may be clear and/or stable. In such embodiments, phase separation and dramatic aggregation are minimized.

In addition, hair styled or treated with compositions according to the disclosure may, in at least certain exemplary embodiments, be hydrophobic, and/or may appear less frizzy and/or may be less prone to breakage, relative to hair subjected to the same conditions but not having been styled or treated with a composition according to the disclosure.

It should be noted, however, that compositions and films, as well as hair to which the composition or film has been applied, according to the disclosure may not have one or more of the herein-referenced properties, yet are intended to be within the scope of the disclosure.

Also disclosed herein are methods for styling the hair, said methods comprising applying a composition according to the disclosure to the hair, either before, during, or after styling the hair. One or more steps of treating the hair with an external stimuli, such as heat, before, during, or after the composition has been applied to the hair are also contemplated.

It is to be understood that both the foregoing description and the following Examples are exemplary and explanatory only, and are not to be interpreted as restrictive of the disclosure. Moreover, it should be understood that various features and/or characteristics of differing embodiments herein may be combined with one another. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the scope of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the disclosure and practice of the various exemplary embodiments disclosed herein.

It is also to be understood that, as used herein the terms “the,” “a,” or “an,” mean “at least one,” and should not be limited to “only one” unless explicitly indicated to the contrary. Thus, for example, the use of “a surfactant” is intended to mean at least one surfactant.

Unless otherwise indicated, all numbers used in the specification and claims are to be understood as being modified in all instances by the term “about,” whether or not so stated. The term “about” as it modifies numbers herein is meant to indicate a difference of 10% or less from the stated number, such as 9% or less, such as 8% or less, such as 7% or less, such as 6% or less, such as 5% or less, such as 4% or less, such as 3% or less, such as 2% or less, or such as 1% or less, in various exemplary embodiments. Thus, by way of example only, in one embodiment where “about” indicates a difference of 10% or less, the phrase “about 20%” is intended to encompass a range from 18%-22%. In another exemplary embodiment where “about” indicates a difference of 5% or less, the phrase “about 20%” is intended to encompass a range from 19%-21%. All such numbers within each specified range are hereby explicitly intended to be included in the disclosure.

It should also be understood that the precise numerical values used in the specification and claims form additional embodiments of the disclosure, and are intended to include any ranges which can be narrowed to any two end points disclosed within the exemplary ranges and values provided, as well as the specific end points themselves. Efforts have been made to ensure the accuracy of the numerical values disclosed herein. Any measured numerical value, however, can inherently contain certain errors resulting from the standard deviation found in its respective measuring technique.

It should be understood that compositions according to various embodiments of the disclosure form a film when applied to a substrate. However, the various properties of the film described herein are intended to include any film provided by compositions according to the disclosure, regardless of whether the film is attached or bonded to the substrate or not. By way of example only, once the compositions are applied to a substrate and a film is formed, the film may subsequently be removed in order to evaluate properties such as strain and Young's modulus.

EXAMPLES

The following Examples are intended to be non-restrictive and explanatory only, with the scope of the invention being defined by the claims.

Procedures

-   A. Procedures for Determination of Physical Properties of Films

Film plating: The latex film was obtained by allowing a 30 gram water solution containing 4 grams of the latex polymer(s) to dry slowly in a 100 mL PFA Petri dish (100 mm diameter×15 mm height) at room temperature for at least 3 days.

Film measurement: The latex film, with known dimensions (length, width, thickness), was mounted on the Q800 Dynamic Mechanical Analysis from TA Instrument, and tested in a DMA Control Force mode. The stress/strain test was obtained using the following procedure:

-   Preload force: 0.001 N -   Isothermal: 25° C. -   Soak time: 0.5 minutes -   Force ramp rate: 0.5 MPa/min to 18 N

The test ended when the sample broke, 18 N force was reached, or maximum displacement was achieved (25.5 mm).

From the stress/strain curve, the Young's Modulus was calculated as the slope of the linear portion at about 0.01% Strain to about 1% Strain. From the stress/strain curve, the %Strain at the stress of 0.5 MPa was also reported.

A high Young's Modulus demonstrates a hard film, while a lower Young's Modulus represents a more elastic film. A high Strain demonstrates a stretchy, elastic film, while a lower Strain represents a more brittle film.

-   B. Procedure for Determination of Mechanical Properties of Hair     Treated With Latex Compositions

Hair treatment: A strip of regular bleached hair (from IHIP, 1 cm in width, 16 cm long, about 2.0-2.5 g of hair) was treated with the latex solution (0.75 g of solution/g hair). The hair was combed through until the solution was uniformly distributed over the surface of the tress. The treated hair was allowed to dry overnight at room temperature.

Hair measurement: Three-point bending measurements were conducted using a texture analyzer (Model TA-XTPlus, Texture Technologies Corporation) equipped with a hair mounting accessory as described in J. Cosmet. Sci., 53, 345-362 (November/December 2002). The cantilever bending experiment consisted of the following sequence of steps: the hair tress was placed on a 2-point of 6 cm width, and the probe, representing the third point, came down at the middle of the hair tress and performed 10 cycles of 10-mm deformations of the hair tress. The testing protocol was:

Test mode=Compression

Pre-test speed=2 mm/sec

Test speed=2 mm/sec

Post-test speed=2 mm/sec

Target mode=Distance

Distance=10 mm

Count=10

Trigger type=Auto (Force)

Trigger force=1 g

After finishing 10 cycles of bending, a plot of force as a function of distance of 10 deformations was generated. From the plot, the maximum force in the first (F1) and the tenth (F10) deformation cycle was determined. The change from F1 to F10 was calculated from:

(F1−F10)/F1×100.

A high maximum force indicated that the hair was stiff and rigid, and a lower maximum force indicated that the hair was softer and more flexible.

Each experiment was run three times, and the results are reported from the average of the three experiments.

-   C. Procedure for Determination of Curl Retention in High Humidity of     Hair Treated With Latex Compositions

Hair treatment: Regular bleached hair swatch (from IHIP, 14.5 cm long, about 0.5 g) was treated with a solution of 2% latex polymers (0.5 g solution/g hair). The hair was combed until the solution was uniformly distributed over the hair swatch surface. The treated hair was then rolled onto a spiral rod (0.5 in diameter) and allowed to dry at room temperature overnight.

Curl retention measurement: The coiled hair was removed from the rod and placed in the humidity chamber at 95% RH, 25° C. for 24 hours. The Curl Retention was calculated as:

(Lo−Lf)/(Lo−Li)×100

wherein Lo=fully extended hair length, Li=initial coiled hair length before humidity exposure, and Lf=final hair length after 24 hours exposure.

Compositions containing latex polymers were evaluated according to the methods described above. The weight of each latex polymer in the following examples is determined on a dry weight basis.

Example 1: Evaluation of Acrylate Latexes

Clear films were obtained from the combination of DAITOSOL 5000AD (INCI name: Acrylates Copolymer, Young's Modulus of 0.4 MPa and strain, under stress at 0.5 MPa, of >150%; polymer A) and FIXATE SUPERHOLD™ (INCI name: Polyacrylate-2 Crosspolymer, Young's Modulus of 1151 MPa and strain, under stress at 0.5 MPa, of 0.01%; polymer B) at various latex polymer ratios. Their physical properties are shown in Table 1A below.

TABLE 1A Young's Strain at 0.5 Component Modulus MPa stress Sample (A:B) (MPa) (%) 1a Polymer A only 0.4 >150 1b  1:10 1104 0.01 1c 1:5 835 0.03 1d 1:3 730 0.06 1e 1:1 519 0.09 1f 3:1 164 0.41 1g 5:1 33 3.94 1h 10:1  3 145.30 1i Polymer B only 1151 0.01

Clear films were obtained from the association of VINYSOL 2140 (Acrylic Copolymer, Young's Modulus of 2 MPa and strain, under stress at 0.5 MPa, of >200%; polymer A) and ACULYN 33™ (INCI name: Acrylates Copolymer, Young's Modulus of 2096 MPa and strain, under stress at 0.5 MPa, of 0.01%; polymer B) at various latex polymer ratios. Their physical properties are shown in Table 1B below.

TABLE 1B Young's Strain at 0.5 Component Modulus MPa stress Sample (A:B) (MPa) (%) 1j Polymer A only 2 >200 1k  1:10 1868 0.02 1l 1:5 1200 0.02 1m 1:3 1062 0.04 1n 1:1 228 0.30 1o 3:1 24 12.07 1p 5:1 8 89.27 1q 10:1  3 >100 1r Polymer B only 2096 0.01

The results in Tables 1A and 1B show that by varying the ratio of the two latex polymers, it is possible to control the hardness (not as hard as Polymer A and not as soft as Polymer B) and flexibility (not as brittle as Polymer A and not as stretchy as Polymer B) of films produced according to various embodiments of the disclosure.

Example 2: Evaluation of Hair Treated with Acrylate Latexes

Hair tresses were treated with 2% solutions of DAITOSOL 5000AD (polymer A) and FIXATE SUPERHOLD™ (polymer B) and at various latex polymer ratios. Their mechanical properties are shown in Table 2A below.

TABLE 2A Sample Component (A:B) F1 (g) Change in F (%) 2a Polymer A only 124 36 2b  1:10 1905 44 2c 1:5 2008 40 2d 1:3 1749 35 2e 1:1 1443 27 2f 3:1 653 29 2g 5:1 515 32 2h 10:1  375 34 2i Polymer B only 2091 44

Hair tresses were treated with 2% solutions of VINYSOL 2140 (polymer A) and ACULYN 33™ (polymer B) at various latex polymer ratios. Their mechanical properties are shown in Table 2B below.

TABLE 2B Sample Component (A:B) F1 (g) Change in F (%) 2j Polymer A only 249 41 2k  1:10 1081 65 2l 1:5 1334 60 2m 1:3 1386 61 2n 1:1 1189 35 2o 3:1 761 53 2p 5:1 636 45 2q 10:1  475 52 2r Polymer B only 1339 67 2s Commercial 1* 1835 76 *Main ingredients: VP/VA copolymer, polyquaternium-11, PEG 90 M, PEG-40 hydrogenated castor oil, acrylates/C10-30 alkyl acrylate crosspolymer, alcohol denatured.

These results show that hair tresses treated with various ratios of the two latex polymers display a wide variety of rigidity, flexibility, stiffness, and softness. Compared to a commercial product (no latex), they show a significantly better styling durability due to the lower change in the maximum force after 10 cycles of deformation.

Example 3: Evaluation of High Humidity Curl Retention of Hair Treated with Acrylate Latexes

Hair swatches were treated with 2% solutions of DAITOSOL 5000AD (polymer A) and FIXATE SUPERHOLD™ (polymer B) at various latex polymer ratios. The high humidity curl retention results are shown in Table 3A below.

TABLE 3A Sample Component (A:B) Curl Retention (%) 3a Polymer A only 29 3b  1:10 82 3c 1:5 80 3d 1:3 82 3e 1:1 80 3f 3:1 59 3g 5:1 44 3h 10:1  38 3i Polymer B only 71

Hair swatches were treated with 2% solutions of VINYSOL 2140 (polymer A) and ACULYN 33™ (polymer B) at various latex polymer ratios. The high humidity curl retention results are shown in Table 3B below.

TABLE 3B Sample Component (A:B) Curl Retention (%) 3j Polymer A only 39 3k  1:10 87 3l 1:5 73 3m 1:3 83 3n 1:1 76 3o 3:1 59 3p 5:1 49 3q 10:1  49 3r Polymer B only 82

These results show that addition of the second latex improves the curl retention, compared to the individual latexes.

Example 4: Evaluation of Effects of Concentration on Performance on Treated Hair

Regular bleached hair was treated with solutions of 1:1 ratio of FIXATE SUPERHOLD and DAITOSOL 5000AD at various latex polymer concentrations. The three-point bending test and the high humidity curl retention test was performed as described above. The results are shown in Table 4 below.

TABLE 4 Sample Concentration F1 (g) Curl Retention (%) 4a 1% 675 81 4b 2% 1207 86 4c 5% 2183 88 4d None (commercial 1*) 1835 42 4e None (commercial 2**) 4394 58 *Main ingredients: VP/VA copolymer, polyquaternium-11, PEG 90 M, PEG-40 hydrogenated castor oil, acrylates/C10-30 alkyl acrylate crosspolymer, alcohol denatured. **Main ingredients: Water, Acrylates/steareth-20 methacrylate crosspolymer, polyquaternium-69, PVP, sorbitol and alcohol denatured.

The results demonstrate that as the concentration of the latexes increases, the hardness of the styled hair increases, as well as an increase in curl retention. It is noted that while having a wide range of hold, styled hair shows a significantly better hydrophobicity and humidity resistance compared to that treated with commercial (no latex) products.

Example 5: Evaluation of Neutralized Latex Polymer vs. Unneutralized Latex Polymer

Combinations of aqueous dispersions comprising latex polymers neutralized to 100% with an amine (Aminomethyl propanol, AMP) were compared with aqueous dispersions comprising unneutralized latex acrylate polymers.

TABLE 5A Test Control Test Control Composition A Composition A Composition B Composition B LUVIFLEX ® SOFT 1 g 1 g — — Acrylates copolymer, Young's Modulus of 2758 MPa and strain, under stress at 0.5 MPa, of <0.01% LUVIFLEX ® MAE 1 g 1 g 1 g 1 g Acrylates copolymer, Young's Modulus of 385 MPa and strain, under stress at 0.5 MPa, of <1% ACUDYNE ™ DHR — — 1 g 1 g Acrylates/hydroxyesters Acrylates Copolymer, Young's Modulus of 56 MPa and strain, under stress at 0.5 MPa, of 2.68% AMP — 0.65 g   — 0.67 g   Deionized water QS to 100 g QS to 100 g QS to 100 g QS to 100 g pH 3.61 6.37 3.66 8.25 Appearance milky crystal clear milky crystal clear

Male mannequin hair was dampened with water. Next, 1 gram of Test Composition A was applied onto one side of the hair, and evenly distributed as a hair spiking product with bare hands. One gram of the Control Composition A, which was neutralized, was applied to the other side. The product was allowed to dry on the hair at ambient conditions.

The same procedure was followed with Test Composition B and Control Composition B.

It was observed that, during application of Control Compositions A and B, the products foamed/creamed on hair, had more viscosity, and felt very sticky and heavy on hair and hands. However, Test Compositions A and B were applied onto the hair very cleanly, invisibly, and without any tack or stickiness on hair or the hands.

Further, curl retention at 90% relative humidity was performed and showed that, after 24 hours, both control (with AMP) swatches elongated more (held the curl less) than the respective test (without AMP) swatches. The results are set forth in Table 5B.

TABLE 5B Final length Initial length Curl Retention Average Curl Sample (cm) (cm) (%) Retention (%) Test A 6.1 6 99 94 6.8 5.9 89 Control A 7.3 6.35 88 88 7.3 6.35 88 Test B 7.8 6.7 85 81 7.4 5.4 77 Control B 6.8 6.4 95 92 6.8 6 90

This evaluation demonstrated that compositions comprising neutralized latexes resulted in products that showed less desirable application and styling efficacy properties, e.g. poorer average curl retention, compared to compositions comprising the unneutralized form. 

What is claimed is:
 1. A hair styling composition comprising at least two latex acrylate polymers, wherein at least one latex acrylate polymer is a film-forming polymer; wherein the at least two latex acrylate polymers are present in a combined amount ranging from about 0.1% to about 30% by weight, relative to the weight of the composition; wherein the at least two latex acrylate polymers are present in the composition in a weight ratio ranging from about 10:1 to about 1:10; and wherein said composition produces a film having a Young's modulus ranging from about 0.05 MPa to about 5 GPa, and a strain, under stress at 0.5 MPa, that ranges up to about 300%.
 2. The hair styling composition of claim 1, wherein the at least two latex acrylate polymers are, independently or together, dispersed particles in an aqueous dispersion medium.
 3. The hair styling composition of claim 1, wherein the at least two latex acrylate polymers are present in a combined amount ranging from about 0.5% to about 10% by weight, relative to the weight of the composition.
 4. The hair styling composition of claim 1, wherein the at least two latex acrylate polymers are present in a combined amount ranging from about 1% to about 5% by weight, relative to the weight of the composition.
 5. The hair styling composition of claim 1, wherein the at least two latex acrylate polymers are present in a combined amount ranging from about 1% to about 3% by weight, relative to the weight of the composition.
 6. The hair styling composition of claim 1, wherein each of the at least two latex acrylate polymers is present in individual amounts ranging from about 0.05% to about 10% by weight, relative to the weight of the composition.
 7. The hair styling composition of claim 1, wherein each of the at least two latex acrylate polymers is present in individual amounts ranging from about 1% to about 15% by weight, relative to the weight of the composition.
 8. The hair styling composition of claim 1, wherein the composition comprising at least two latex acrylate polymers comprises: (a) polymer A, having a Young's modulus ranging from about 0.1 MPa to about 10 MPa, and a strain, under stress at 0.5 MPa, of at least about 1%; and (b) polymer B, having a Young's modulus ranging from about 10 MPa to about 6 GPa, and a strain, under stress at 0.5 MPa, of less than about 5%.
 9. The hair styling composition of claim 8, wherein the at least two latex acrylate polymers are present in the composition in a weight ratio of about 1:5 to about 5:1.
 10. The hair styling composition of claim 8, wherein the at least two latex acrylate polymers are present in the composition in a weight ratio of about 1:3 to about 3:1.
 11. The hair styling composition of claim 8, wherein the at least two latex acrylate polymers are present in the composition in a weight ratio of about 1:2 to about 2:1.
 12. The hair styling composition of claim 8, wherein the at least two latex acrylate polymers are present in the composition in a weight ratio of about 1:1.
 13. The hair styling composition of claim 8, wherein the film has a Young's modulus ranging from about 80 MPa to about 5 GPa and a strain, under stress at 0.5 MPa, ranging from about 0.01% to less than about 1%.
 14. The hair styling composition of claim 13, wherein the weight ratio of polymer A to polymer B is about 1:10 to about 1:1.
 15. The hair styling composition of claim 9, wherein the film has a Young's modulus ranging from about 5 MPa to about 100 MPa and a strain, under stress at 0.5 MPa, ranging from about 0.5% to less than about 20%.
 16. The hair styling composition of claim 15, wherein the weight ratio of polymer A to polymer B is about 3:1 to about 10:1.
 17. The hair styling composition of claim 8, wherein the film has a Young's modulus ranging from about 0.05 MPa to about 5 MPa and a strain, under stress at 0.5 MPa, ranging from about 10% to about 300%.
 18. The hair styling composition of claim 17, wherein the weight ratio of polymer A to polymer B is about 5:1 to about 10:1.
 19. The hair styling composition of claim 1, further comprising at least one solvent.
 20. A hair styling composition comprising: (1) an aqueous dispersion comprising at least two latex acrylate polymers, wherein at least one latex acrylate polymer is a film-forming polymer, said aqueous dispersion comprising: (a) at least one polymer A, having a Young's modulus ranging from about 0.1 MPa to about 10 MPa, and a strain, under stress at 0.5 MPa, of at least about 1%; and (b) at least one polymer B, having a Young's modulus ranging from about 10 MPa to about 6 GPa, and a strain, under stress at 0.5 MPa, of less than about 5%; and (2) at east one solvent; wherein the at least two latex acrylate polymers are present in a combined amount of less than about 10% by weight, relative to the weight of the composition; wherein the at least two latex acrylate polymers are present in the composition in a weight ratio ranging from about 10:1 to about 1:10; and wherein said composition produces a film having a Young's modulus ranging from about 0.05 MPa to about 5 GPa, and a strain, under stress at 0.5 MPa, that ranges up to about 300%.
 21. A method of styling the hair, said method comprising applying a composition comprising at least two latex acrylate polymers to the hair, wherein at least one latex acrylate polymer is a film-forming polymer; wherein the at least two latex acrylate polymers are present in a combined amount ranging from about 0.1% to about 30% by weight, relative to the weight of the composition; wherein the at least two latex acrylate polymers are present in the composition in a weight ratio ranging from about 10:1 to about 1:10; and wherein said composition produces a film having a Young's modulus ranging from about 0.05 MPa to about 5 GPa, and a strain, under stress at 0.5 MPa, that ranges up to about 300%.
 22. The method of claim 21, further comprising a step of treating the hair with heat at a temperature ranging from about 25° C. to about 250° C. before, during, or after the application of said composition.
 23. A method of styling the hair, said method comprising applying to the hair a composition comprising: (1) an aqueous dispersion comprising at least two latex acrylate polymers, wherein at least one latex acrylate polymer is a film-forming polymer, said aqueous dispersion comprising: (a) at least one polymer A, having a Young's modulus ranging from about 0.1 MPa to about 10 MPa, and a strain, under stress at 0.5 MPa, of at least about 1%; and (b) at least one polymer B, having a Young's modulus ranging from about 10 MPa to about 6 GPa, and a strain, under stress at 0.5 MPa, of less than about 5%; and (2) at least one solvent; wherein the at least two latex acrylate polymers are present in a combined amount of less than about 10% by weight, relative to the weight of the composition; wherein the at least two latex acrylate polymers are present in the composition in a weight ratio ranging from about 10:1 to about 1:10; and wherein said composition produces a film having a Young's modulus ranging from about 0.05 MPa to about 5 GPa, and a strain, under stress at 0.5 MPa, that ranges up to about 300%.
 24. The method of claim 23, further comprising a step of treating the hair with heat at a temperature ranging from about 25° C. to about 250° C. before, during, or after the application of said composition. 